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AU588256B2 - Decoder for spectrum diffusion signals - Google Patents

Decoder for spectrum diffusion signals

Info

Publication number
AU588256B2
AU588256B2 AU48491/85A AU4849185A AU588256B2 AU 588256 B2 AU588256 B2 AU 588256B2 AU 48491/85 A AU48491/85 A AU 48491/85A AU 4849185 A AU4849185 A AU 4849185A AU 588256 B2 AU588256 B2 AU 588256B2
Authority
AU
Australia
Prior art keywords
sub
signal
extraction
output
spectrum diffusion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
AU48491/85A
Other versions
AU4849185A (en
Inventor
Masahiro Fujita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of AU4849185A publication Critical patent/AU4849185A/en
Application granted granted Critical
Publication of AU588256B2 publication Critical patent/AU588256B2/en
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/709—Correlator structure
    • H04B1/7093—Matched filter type

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

A decoder for spectrum diffusion signals is capable of reproducing data from received a spectrum diffusion signal (SS<sub>IN</sub>), such as sattellite communication signals without performing PN synchronization. The decoder comprises a correlation detecting means (24,) comprising a matched filter which produces a backdiffusion signal (I<sub>R</sub>) when a received spectrum diffusion signal (SS<sub>IN</sub>) correlates with a Gold code for a specific channel of a station, an extraction signal generator means (29) for detecting the epoch position of a peak of a triangular wave which appears in the output of the correlation detecting means (24,) when correlation between the spectrum diffusion signal (SS<sub>IN</sub>) and the specific Gold code identifying the corresponding channel is established, and a data output extracting means (26) responsive to the extraction signal (S<sub>2</sub>) to extract the back-diffusion signal (I<sub>R</sub>) and reproduce the resulting data. In this arrangement, the extraction signal generator means (29) is responsive to the peak of the triangular-form wave in the back-diffusion signal (I<sub>R</sub>) from the correlation detecting means (24,) to output the extraction signal (S<sub>2</sub>). The extraction signal (S<sub>2</sub>) is sent to the data output extraction means (26) to extract back-diffusion signal (I<sub>R</sub>) from the output of the correlation detecting means (24,) and reproduce the data output. Therefore, according to the invention, it is unnecessary to perform PN synchronization in order to obtaining data from the spectrum diffusion signal (SS<sub>IN</sub>).
AU48491/85A 1984-10-12 1985-10-10 Decoder for spectrum diffusion signals Expired AU588256B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59214599A JPS6193746A (en) 1984-10-12 1984-10-12 Spread spectrum communication demodulator
JP59-214599 1984-10-12

Publications (2)

Publication Number Publication Date
AU4849185A AU4849185A (en) 1986-04-17
AU588256B2 true AU588256B2 (en) 1989-09-14

Family

ID=16658381

Family Applications (1)

Application Number Title Priority Date Filing Date
AU48491/85A Expired AU588256B2 (en) 1984-10-12 1985-10-10 Decoder for spectrum diffusion signals

Country Status (7)

Country Link
US (1) US4651327A (en)
EP (1) EP0177963B1 (en)
JP (1) JPS6193746A (en)
AT (1) ATE62572T1 (en)
AU (1) AU588256B2 (en)
CA (1) CA1260141A (en)
DE (1) DE3582469D1 (en)

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DE3601576A1 (en) * 1986-01-21 1987-07-23 Standard Elektrik Lorenz Ag RECEIVER FOR BAND-SPREADED SIGNALS
JPS6313440A (en) * 1986-07-02 1988-01-20 Nec Corp Receiving device for spread spectrum signal
US4800577A (en) * 1986-07-07 1989-01-24 Matsushita Electric Industrial Co., Ltd. GPS receiver
US4903279A (en) * 1986-09-30 1990-02-20 Aisin Seiki Kabushiki Kaisha Receiver for spread spectrum communication and receiving method for the same
US4888788A (en) * 1986-11-20 1989-12-19 Matsushita Electric Industrial Co., Ltd. Transmitting and receiving systems
WO1991003892A1 (en) * 1987-01-27 1991-03-21 Advanced Systems Research Pty Limited Improvements in a spread-spectrum multiplexed transmission system
GB2203303B (en) * 1987-03-31 1991-02-13 Stc Plc Radio frequency tracking loop
CA1318368C (en) * 1988-01-14 1993-05-25 Yoshitaka Uchida Correlation pulse generator
JPH0810839B2 (en) * 1988-01-21 1996-01-31 宣夫 御子柴 Spread spectrum communication device
GB2251533B (en) * 1988-01-21 1992-09-23 Nobuo Mikoshiba Spread-spectrum communication apparatus
JP2648848B2 (en) * 1988-07-12 1997-09-03 クラリオン株式会社 Correlation pulse generation circuit in spread spectrum receiver.
US4908836A (en) * 1988-10-11 1990-03-13 Unisys Corporation Method and apparatus for decoding multiple bit sequences that are transmitted simultaneously in a single channel
US5031173A (en) * 1989-08-15 1991-07-09 Unisys Corporation Decoder for added asynchronous bit sequences
US5090024A (en) * 1989-08-23 1992-02-18 Intellon Corporation Spread spectrum communications system for networks
US5103460A (en) * 1989-10-17 1992-04-07 Clarence H. Stewart Spread spectrum intercept apparatus and method
US5113409A (en) * 1989-10-17 1992-05-12 Stewart Clarence H Spread spectrum intercept apparatus and method
US5016256A (en) * 1989-10-17 1991-05-14 Stewart Clarence H Spread spectrum intercept apparatus and method
US5265121A (en) * 1989-10-17 1993-11-23 Juanita H. Stewart Spread spectrum coherent processor
US5511099A (en) * 1994-03-30 1996-04-23 Samsung Electronics Co., Ltd. Passband sync block recovery
US5579014A (en) * 1995-01-20 1996-11-26 General Electric Company Parallel correlator for global positioning system receiver
JP3307217B2 (en) * 1996-03-01 2002-07-24 株式会社豊田自動織機 Receiver for spread spectrum communication system
JPH09275364A (en) * 1996-04-08 1997-10-21 Toyota Autom Loom Works Ltd Synchronization device for spread spectrum communication
US5808730A (en) * 1997-04-08 1998-09-15 Ceramoptec Industries Inc. Fiber optic displacement sensor
JP2002198932A (en) * 1997-09-30 2002-07-12 Matsushita Electric Ind Co Ltd Correlation detection method and matched filter
US6625205B1 (en) * 1998-06-23 2003-09-23 Yozan Corporation Matched filter circuit
US6442190B1 (en) 1998-11-10 2002-08-27 The Board Of Regents Of The University Of Nebraska Method and system for self-encoding a sequential string of data symbols for transmission via communication systems
JP2000151461A (en) * 1998-11-10 2000-05-30 Kazuo Tsubouchi Communication system using surface acoustic wave matched filter
JP3412689B2 (en) 1999-08-26 2003-06-03 日本電気株式会社 Mobile phone
JP3576913B2 (en) 2000-02-10 2004-10-13 三菱電機株式会社 Spread spectrum demodulator
JP4583054B2 (en) * 2004-03-05 2010-11-17 株式会社エヌ・ティ・ティ・ドコモ Mobile station and base station

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU537148B2 (en) * 1980-05-30 1984-06-07 Nippon Electric Co. Ltd. Code division multiplex transmission

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114155A (en) * 1976-07-30 1978-09-12 Cincinnati Electronics Corporation Position determining apparatus and method
US4445118A (en) * 1981-05-22 1984-04-24 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Navigation system and method
DE3131185C2 (en) * 1981-08-06 1984-04-12 Siemens AG, 1000 Berlin und 8000 München Receiver for pseudo-random phase-modulated signals
US4471164A (en) * 1981-10-13 1984-09-11 At&T Bell Laboratories Stream cipher operation using public key cryptosystem
US4538281A (en) * 1982-05-06 1985-08-27 Rockwell International Corporation Adaptive acquisition of multiple access codes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU537148B2 (en) * 1980-05-30 1984-06-07 Nippon Electric Co. Ltd. Code division multiplex transmission

Also Published As

Publication number Publication date
AU4849185A (en) 1986-04-17
ATE62572T1 (en) 1991-04-15
DE3582469D1 (en) 1991-05-16
EP0177963A3 (en) 1987-09-30
JPS6193746A (en) 1986-05-12
EP0177963A2 (en) 1986-04-16
EP0177963B1 (en) 1991-04-10
CA1260141A (en) 1989-09-26
US4651327A (en) 1987-03-17

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